1.

A coolie works for 8 3\4 hours per day. How many hours of work does he put in a month of 31 days.​

Answer»

The coolie does ZERO work because the displacement and force are PERPENDICULAR to each other.

From the formula,

Work = FScos

work \: done = fs \cos( \alpha ) \: were \:  \alpha \:  is \: the \: angle \: between \: force \: and \: displcement \\ since \: cos90 = 0 \\ te \: coolie \: does \: no \: work

Hope this is HELPFUL to you

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